Pioska of Hungary

Pioska of Hungary (1062-), also known as Irene of Hungary was the princess of Hungary, the first daughter of King Laszlo I of Hungary, and the Empress of the Byzantine Empire from 1104 to 1118.

Biography
Pioska was the second child and first daughter of King Laszlo I of Hungary and his wife Adelaide of Swabia. In an effort to increase negotiations with the Byzantine Empire, her brother King Kalman married her to John Comnenus, the heir of the empire. She reigned as Empress of Byzantium from 1104 to 1118.